⚠️There's a newer version (1.17.6) of this package.Take me there.

data.table (version 1.5.1)

Extension of data.frame for fast subset, fast merge and fast grouping.

Description

Enhanced data.frame. Fast subset, grouping and merge in a short and flexible syntax. i and j may be expressions of column names directly, for faster development. Example: X[Y] is a fast join for large data.

Copy Link

Version

Install

install.packages('data.table')

Monthly Downloads

847,543

Version

1.5.1

License

GPL

Maintainer

M Dowle

Last Published

January 8th, 2011

Functions in data.table (1.5.1)

duplicated

Determine Duplicate Rows

Extract.data.table

Query a data table

merge

Merge Two Data Tables

between

Convenience function for range subset logic.

Creates a Join data table

Convenience function for calling regexpr.

Integer based date class

test.data.table

Runs a set of tests.

timetaken

Pretty print of time taken

tables

Display all objects of class 'data.table'

setkey

Create key on a data table

last

Last item of an object